Turbocharger

Abstract

A turbocharger includes: a bearing; a bearing wall portion having a bearing hole in which the bearing is arranged; a separation wall portion, which is provided on a radially outer side of the bearing hole with respect to the bearing wall portion, and forms an internal space with the bearing wall portion; an oil discharge port, which is formed in the separation wall portion, and communicates with the internal space; and a guide portion, which is provided to the bearing wall portion facing the internal space, and separates away from the oil discharge port in a direction of a plane perpendicular to a center axis of the bearing as approaching the oil discharge port in a direction of the center axis.

What is claimed is: 
     
       1. A turbocharger comprising:
 a bearing; 
 a bearing wall portion having a bearing hole in which the bearing is arranged, the bearing wall portion including a guide portion; 
 a separation wall portion, which is provided on a radially outer side of the bearing hole with respect to the bearing wall portion, and forms an internal space with the bearing wall portion; and 
 an oil discharge port, which is formed in the separation wall portion, and communicates with the internal space, 
 wherein the guide portion faces the internal space, and increasingly separates away from the oil discharge port following a direction of a plane perpendicular to a center axis of the bearing, while approaching the oil discharge port in a direction following the center axis from an end portion of the guide portion, opposite to the oil discharge port side which is arranged at a position in the center axis direction of an end surface of the bearing. 
 
     
     
       2. The turbocharger according to  claim 1 , wherein the guide portion has portions having a different inclination from each other depending on a position in the direction of the center axis. 
     
     
       3. The turbocharger according to  claim 1 , wherein the guide portion includes:
 a first guide portion which extends toward the turbine impeller away from the oil discharge port; and 
 a second guide portion which extends toward the compressor impeller with respect to the first guide portion. 
 
     
     
       4. The turbocharger according to  claim 2 , wherein the guide portion includes:
 a first guide portion which extends toward the turbine impeller away from the oil discharge port; and 
 a second guide portion which extends toward the compressor impeller with respect to the first guide portion. 
 
     
     
       5. The turbocharger according to  claim 3 , further comprising a top portion which is formed between the first guide portion and the second guide portion,
 wherein a position of the top portion in the direction of the center axis overlaps a position of the oil discharge port in the direction of the center axis. 
 
     
     
       6. The turbocharger according to  claim 4 , further comprising a top portion which is formed between the first guide portion and the second guide portion,
 wherein a position of the top portion in the direction of the center axis overlaps a position of the oil discharge port in the direction of the center axis.